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2. Demagnetizing field - Wikipedia

   en.wikipedia.org/wiki/Demagnetizing_field

   The demagnetizing field, also called the stray field (outside the magnet), is the magnetic field (H-field) [1] generated by the magnetization in a magnet.The total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents.

3. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.

4. Degaussing - Wikipedia

   en.wikipedia.org/wiki/Degaussing

   If this plate becomes magnetized (e.g. if someone sweeps a magnet on the screen or places loudspeakers nearby), it imparts an undesired deflection to the electron beams and the displayed image becomes distorted and discolored. To minimize this, CRTs have a copper or aluminum coil wrapped around the front of the display, known as the degaussing ...

5. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver has been replaced in many workplaces and homes with a more modern and versatile tool, a power drill, as they are quicker, easier, and can also drill holes. The shaft is usually made of ...

6. Coercivity - Wikipedia

   en.wikipedia.org/wiki/Coercivity

   Equivalent definitions for coercivities in terms of the magnetization-vs-field (M-H) curve, for the same magnet. Coercivity in a ferromagnetic material is the intensity of the applied magnetic field (H field) required to demagnetize that material, after the magnetization of the sample has been driven to saturation by a strong field. This ...

7. Magnetic switchable device - Wikipedia

   en.wikipedia.org/wiki/Magnetic_switchable_device

   A round permanent magnet is inserted into the bored hole and a handle is attached to allow rotation of the magnet. This act of rotation changes the orientation of the magnetic field. [4] In the off position, the poles are oriented towards the non-ferrous core.